Update-grub does not find some systems

Since the latest update the update-grub script does not find some systems.

Some details : I have several HDDs active ( each with different systems incluing windows, BSDs ) …

Up until the one recent update I had to call _update-grub- twice after any pamac update, because the first time ( during the pamac software update ) it only have found Manjaro system and populate the menus with the Manjaro entries…
Afterwards ( rebooted ) and called _update-grub- again and it displayed all the required entries…

Although with the latest update it displays| identifies some entries ( such as Windows ) but it it misses a HDD with Proxmox ( Debian based ) complete installation …
Any ideas how can I start to aid and solve this ?